Mercury Dialog consists of a GUI for the source control management tool Mercurial and enables the user to perform version control tasks (e.g. commit, revert, tag, push, pull, branch, diff, ...) directly within MATLAB. Additionally, Simulink blocks are supplied that visualize the current status of Simulink models within the sandbox and repository. Finally, there is also a small wrapper for the hg command to integrate Mercurial into the MATLAB command-line.